is glutathione sulfur based Toxicity of Glutathione-Binding Metals: A Review of Targets and Mechanisms is glutathione sulfur based Sulfur

Most people take glutathione on an empty stomach, either first thing in the morning or before bed

Drug Metab Dispos 31(6):805813 Pickering AM, Linder RA, Zhang H, Forman HJ, Davies KJ (2012) Nrf2-dependent induction of proteasome and Pa28 regulator are required for adaptation to oxidative stress

Winner B, Kohl Z, Gage FH

A novel enzyme (the bifunctional glutathione synthetase encoded by gshF ) that possessed both -GCS and GS activities and was non-sensitive to GSH was discovered in several microorganisms, including Streptococcus agalactiae [10], Enterococcus faecalis [10], Listeria monocytogenes [11], and Streptococcus thermophiles [12]